If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
u/5 = 6.25 // - 6.25
u/5-6.25 = 0
1/5*u-6.25 = 0 // + 6.25
1/5*u = 6.25 // : 1/5
u = 6.25/1/5
u = 31.25
u = 31.25
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